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Durability of concrete is very important factor as it affects the performance of concrete. When the durability aspect of concrete taken into account, the factors affecting it should be given an important consideration as it directly affect the performance of concrete. One such factor is chemical attack on the concrete by sulphate ions (SO4 ) which results in the volume change, cracking and consequent deterioration of concrete thus hampering its durability and reducing its strength. The objective of this experimental study is to find out the behaviour of concrete produced by replacing natural sand by Fly ash and Manufactured sand in varying percentages subjected to with sulphate attack and without sulphate attack. Magnesium sulphate solution with concentration of 5% subjected to sulphate attack for 58 days is used in present work. Thus in this research programme the prime attention will be given to find out properties of concrete produced by replacing the natural sand by Fly ash and Manufactured sand in various percentages like 0%, 20%. 40%, 60%, 80%. The mechanical properties such as compressive strength, tensile strength and flexural strength are found and compared for concrete produced by replacing natural sand by Fly ash and Manufactured sand.

Experimental Investigation on Strength and Durability Properties of Concrete by Replacing Natural Sand by Manufacture Sand and Fly Ash